Clients who receive audit or accreditation services are billed monthly. Account Statements are issued by the National Finance Center (NFC) at the end of each month. Payment is due by the 25th of the month following the date of the invoice. All payments should include the client's account number to ensure payment is applied to the correct account. The Government charges a 15 percent interest rate for delinquent balances.

Clients have five payment options: (1) electronic fund transfer; (2) credit card; (3) check; (4) cashier's check; and (5) money order. Payments made by electronic fund transfer (EFT) and credit card are applied to the account in a timely manner. Payments made by check, cashier's check or money order should be mailed by the 15th of the month to ensure payment is applied to the account in a timely manner. The time lapse between when the payment is mailed and when the payment is applied to accounts is 7 to 10 business days.